The $855 million Landsat mission, headed by NASA and the U.S. Geological Survey, is the eighth in a series that began in 1972. For four decades, the Landsat satellites have tracked retreating glaciers, drought conditions, agricultural crop output and deforestation.

The newest Landsat carries instruments that are more powerful than its predecessors. It'll send back images to ground stations in South Dakota, Alaska and Norway.

Online Public Information File

Viewers with disabilities can get assistance accessing this station's FCC Public Inspection File by contacting the station with the information listed below. Questions or concerns relating to the accessibility of the FCC's online public file system should be directed to the FCC at 888-225-5322, 888-835-5322 (TTY), or fccinfo@fcc.gov.